Supervised learning and frequency domain averaging‐based adaptive channel estimation scheme for filterbank multicarrier with offset quadrature amplitude modulation

다국어 초록 (Multilingual Abstract)

Filterbank multicarrier with offset quadrature amplitude modulation (FBMC‐OQAM) is an attractive alternative to the orthogonal frequency division multiplexing (OFDM) modulation technique. In comparison with OFDM, the FBMC‐OQAM signal has better spectral confinement and higher spectral efficiency and tolerance to synchronization errors, primarily due to per‐subcarrier filtering using a frequency‐time localized prototype filter. However, the filtering process introduces intrinsic interference among the symbols and complicates channel estimation (CE). An efficient way to improve the CE in FBMC‐OQAM is using a technique known as windowed frequency domain averaging (FDA); however, it requires a priori knowledge of the window length parameter which is set based on the channel's frequency selectivity (FS). As the channel's FS is not fixed and not a priori known, we propose a k‐nearest neighbor‐based machine learning algorithm to classify the FS and decide on the FDA's window length. A comparative theoretical analysis of the mean‐squared error (MSE) is performed to prove the proposed CE scheme's effectiveness, validated through extensive simulations. The adaptive CE scheme is shown to yield a reduction in CE‐MSE and improved bit error rates compared with the popular preamble‐based CE schemes for FBMC‐OQAM, without a priori knowledge of channel's frequency selectivity.

참고문헌 (Reference)

1 J. Li, "Zukerman Moshe, cognitive radio network assisted by OFDM with index modulation" 69 (69): 1106-1110, 2020

2 Sahibsingh A. Dudani, "The Distance-Weighted k-Nearest-Neighbor Rule" Institute of Electrical and Electronics Engineers (IEEE) SMC-6 (SMC-6): 325-327, 1976

3 M. Bellanger, "Specification and design of a prototype filter for filter bank based multicarrier transmission" 2417-2420, 2001

4 Ephraim T. Iorkyase, "RF‐based location of partial discharge sources using received signal features" Institution of Engineering and Technology (IET) 4 (4): 28-32, 2019

5 D. Katselis, "Preamble-based channel estimation in OFDM/OQAM systems: A review" 93 (93): 2038-2054, 2013

6 H. Wang, "Preamble design with interference cancellation for channel estimation in MIMO-FBMC/OQAM systems" 6 : 44072-44081, 2018

7 A. Viholainen, "Phydyas project, deliverable 5.1: Prototype filter and structure optimization" Plone Foundation 2009

8 G. Guo, "On The Move to Meaningful Internet Systems 2003: CoopIS, DOA, and ODBASE, vol. 2888" Springer 986-996, 2003

9 B. Farhang-Boroujeny, "OFDM versus filter bank multicarrier" 28 (28): 92-112, 2011

10 Han Wang, "Novel Preamble Design for Channel Estimation in FBMC/OQAM Systems" 한국인터넷정보학회 10 (10): 3672-3688, 2016

11 Vincent Savaux, "Mean square error analysis and linear minimum mean square error application for preamble‐based channel estimation in orthogonal frequency division multiplexing/offset quadrature amplitude modulation systems" Institution of Engineering and Technology (IET) 9 (9): 1763-1773, 2015

12 J. Li, "Layered orthogonal frequency division multiplexing with index modulation" 13 (13): 3793-3802, 2019

13 "Guidelines for evaluation of radio transmission technologies for imt-2000"

14 M. Wen, "Generalized multiple-mode OFDM with index modulation" 17 (17): 6531-6543, 2018

15 Vibhutesh Kumar Singh, "Generalized Least Squares Based Channel Estimation for FBMC-OQAM" Institute of Electrical and Electronics Engineers (IEEE) 7 : 129411-129420, 2019

16 D. Kong, "Frequency domain averaging for channel estimation in OQAM-OFDM systems" 3116-3121, 2013

17 M.Wen, "Enhanced orthogonal frequency division multiplexing with indexmodulation" 16 (16): 4786-4801, 2017

18 T.Wang, "Efficient techniques for cost-sensitive learning with multiple cost considerations" University of Technology 2013

19 R. Jain, "Channel models: A tutorial" 1-6, 2007

20 Alain Sibille, "Channel estimation methods for preamble-based OFDM/OQAM modulations" Wiley 19 (19): 741-750, 2008

21 SeungWon Kang, "A Novel Channel Estimation Scheme for OFDM/OQAM-IOTA System" 한국전자통신연구원 29 (29): 430-436, 2007